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Revenue Recognition (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 29, 2019 | Jun. 30, 2018 | Jun. 29, 2019 | Jun. 30, 2018
Sales returns and allowances accrual activity [Roll Forward] |  |  |  |
Beginning balance | $ 37,577 | $ 32,706 | $ 42,663 | $ 36,680
Sales allowances | 28,903 | 25,365 | 57,114 | 49,553
Credits issued | (22,270) | (19,348) | (55,332) | (47,798)
Foreign currency | 172 | (691) | (63) | (403)
Ending balance | $ 44,382 | $ 38,032 | $ 44,382 | $ 38,032

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